diff --git a/frontend/libs/components/moodboard/src/lib/persistence/moodboardSync.ts b/frontend/libs/components/moodboard/src/lib/persistence/moodboardSync.ts
index 984682a91c..2b022020ce 100644
--- a/frontend/libs/components/moodboard/src/lib/persistence/moodboardSync.ts
+++ b/frontend/libs/components/moodboard/src/lib/persistence/moodboardSync.ts
@@ -1,6 +1,7 @@
 import { useEffect, useState } from "react";
 import { create } from "zustand";
 import { useBoardLibraryStore } from "../boards/BoardLibraryStore";
+import type { Board } from "../boards/boardTypes";
 import { useMoodboardStore } from "../canvas/MoodboardStore";
 import type {
   MoodboardAdapter,
diff --git a/frontend/libs/components/moodboard/src/lib/ui/Toolbar.tsx b/frontend/libs/components/moodboard/src/lib/ui/Toolbar.tsx
index 637a24b30c..277e7b3ade 100644
--- a/frontend/libs/components/moodboard/src/lib/ui/Toolbar.tsx
+++ b/frontend/libs/components/moodboard/src/lib/ui/Toolbar.tsx
@@ -29,7 +29,9 @@ export const ToolbarDivider = () => (
   <span className="h-7 w-px shrink-0 bg-ui-divider" aria-hidden />
 );
 
-interface ToolbarIconButtonProps {
+// Exported: FloatingToolbarButton re-exports ToolbarIconButton, and
+// declaration emit (TS4023) needs this props type to be nameable there.
+export interface ToolbarIconButtonProps {
   icon: IconDefinition;
   label: string;
   active?: boolean;
diff --git a/frontend/libs/components/upload-modal/src/lib/UploadModal3D/utilities/convertFbxToGlb.ts b/frontend/libs/components/upload-modal/src/lib/UploadModal3D/utilities/convertFbxToGlb.ts
index 4dc1f431d4..4203a94ee5 100644
--- a/frontend/libs/components/upload-modal/src/lib/UploadModal3D/utilities/convertFbxToGlb.ts
+++ b/frontend/libs/components/upload-modal/src/lib/UploadModal3D/utilities/convertFbxToGlb.ts
@@ -1,5 +1,12 @@
 import { FBXLoader } from "three/addons/loaders/FBXLoader.js";
 import { GLTFExporter } from "three/addons/exporters/GLTFExporter.js";
+// `?worker&inline` (see src/vite-env.d.ts): the worker is bundled as
+// self-contained inline code inside this library's output. The
+// `new Worker(new URL(...), import.meta.url)` form breaks CONSUMING builds —
+// the lib build rewrites it to a hashed asset path in dist/index.js, which
+// the consumer's vite (worker-import-meta-url plugin) then fails to resolve
+// as an entry module.
+import ConvertFbxToGlbWorker from "./convertFbxToGlb.worker?worker&inline";
 
 // Convert an FBX file (e.g. a Mixamo download) to a binary GLB, preserving
 // skeletal animation clips. Everything downstream of the picker — the
@@ -62,10 +69,7 @@ function getWorker(): Worker | null {
     return worker;
   }
   try {
-    worker = new Worker(
-      new URL("./convertFbxToGlb.worker.ts", import.meta.url),
-      { type: "module" },
-    );
+    worker = new ConvertFbxToGlbWorker();
     worker.onmessage = (event) => {
       const data = event.data as
         | { id: number; ok: true; glb: ArrayBuffer }
diff --git a/frontend/libs/components/upload-modal/src/vite-env.d.ts b/frontend/libs/components/upload-modal/src/vite-env.d.ts
new file mode 100644
index 0000000000..eac87d0d2e
--- /dev/null
+++ b/frontend/libs/components/upload-modal/src/vite-env.d.ts
@@ -0,0 +1,10 @@
+// Vite worker-import shim (used by convertFbxToGlb.ts). `?worker&inline`
+// bundles the worker as SELF-CONTAINED inline code — the only worker form
+// that survives being built into this library's dist and then re-bundled by
+// a consuming app's vite build. The `new Worker(new URL(...))` pattern does
+// not: the lib build rewrites it to a hashed asset path that the consumer's
+// worker-import-meta-url plugin then fails to resolve as an entry module.
+declare module "*?worker&inline" {
+  const WorkerFactory: new () => Worker;
+  export default WorkerFactory;
+}